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<FONT color="green">001</FONT>    package com.google.code.guava.beans;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import static com.google.common.base.Preconditions.checkNotNull;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    import java.beans.BeanInfo;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.beans.IntrospectionException;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.beans.Introspector;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.beans.PropertyDescriptor;<a name="line.8"></a>
<FONT color="green">009</FONT>    import java.util.Map;<a name="line.9"></a>
<FONT color="green">010</FONT>    import java.util.concurrent.TimeUnit;<a name="line.10"></a>
<FONT color="green">011</FONT>    <a name="line.11"></a>
<FONT color="green">012</FONT>    import com.google.code.guava.base.Exceptions;<a name="line.12"></a>
<FONT color="green">013</FONT>    import com.google.common.base.Function;<a name="line.13"></a>
<FONT color="green">014</FONT>    import com.google.common.base.Objects;<a name="line.14"></a>
<FONT color="green">015</FONT>    import com.google.common.collect.ImmutableList;<a name="line.15"></a>
<FONT color="green">016</FONT>    import com.google.common.collect.MapMaker;<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    /**<a name="line.18"></a>
<FONT color="green">019</FONT>     * Some {@link Introspector} routines, wrapped in a friendlier API and using a<a name="line.19"></a>
<FONT color="green">020</FONT>     * more multi-threading friendly caching system.<a name="line.20"></a>
<FONT color="green">021</FONT>     */<a name="line.21"></a>
<FONT color="green">022</FONT>    public final class Introspection{<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>        enum BeanInfoAccessor implements Function&lt;ClassTuple, BeanInfo&gt;{<a name="line.24"></a>
<FONT color="green">025</FONT>            INSTANCE{<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>                public BeanInfo apply(final ClassTuple tuple){<a name="line.27"></a>
<FONT color="green">028</FONT>                    try{<a name="line.28"></a>
<FONT color="green">029</FONT>                        return Introspector.getBeanInfo(tuple.getBaseClass(),<a name="line.29"></a>
<FONT color="green">030</FONT>                            tuple.getStopClass());<a name="line.30"></a>
<FONT color="green">031</FONT>                    }catch(final IntrospectionException e){<a name="line.31"></a>
<FONT color="green">032</FONT>                        throw Exceptions.rethrow(e,<a name="line.32"></a>
<FONT color="green">033</FONT>                            "Error getting BeanInfo for base class: %s and stop class: %s",<a name="line.33"></a>
<FONT color="green">034</FONT>                            tuple.getBaseClass(),<a name="line.34"></a>
<FONT color="green">035</FONT>                            tuple.getStopClass());<a name="line.35"></a>
<FONT color="green">036</FONT>                    }<a name="line.36"></a>
<FONT color="green">037</FONT>                }<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>            }<a name="line.39"></a>
<FONT color="green">040</FONT>        }<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>        static final class ClassTuple{<a name="line.42"></a>
<FONT color="green">043</FONT>    <a name="line.43"></a>
<FONT color="green">044</FONT>            public static Object from(final Class&lt;?&gt; beanClass){<a name="line.44"></a>
<FONT color="green">045</FONT>                return new ClassTuple(beanClass);<a name="line.45"></a>
<FONT color="green">046</FONT>            }<a name="line.46"></a>
<FONT color="green">047</FONT>    <a name="line.47"></a>
<FONT color="green">048</FONT>            public static ClassTuple from(final Class&lt;?&gt; beanClass,<a name="line.48"></a>
<FONT color="green">049</FONT>                final Class&lt;?&gt; stopClass){<a name="line.49"></a>
<FONT color="green">050</FONT>                return new ClassTuple(beanClass, stopClass);<a name="line.50"></a>
<FONT color="green">051</FONT>            }<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>            private final Class&lt;?&gt; baseClass;<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>            private final Class&lt;?&gt; stopClass;<a name="line.55"></a>
<FONT color="green">056</FONT>    <a name="line.56"></a>
<FONT color="green">057</FONT>            private ClassTuple(final Class&lt;?&gt; baseClass){<a name="line.57"></a>
<FONT color="green">058</FONT>                this(baseClass, null);<a name="line.58"></a>
<FONT color="green">059</FONT>            }<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>            private ClassTuple(final Class&lt;?&gt; baseClass, final Class&lt;?&gt; stopClass){<a name="line.61"></a>
<FONT color="green">062</FONT>                this.baseClass =<a name="line.62"></a>
<FONT color="green">063</FONT>                    checkNotNull(baseClass, "Bean class may not be null");<a name="line.63"></a>
<FONT color="green">064</FONT>                this.stopClass = stopClass == null ? Object.class : stopClass;<a name="line.64"></a>
<FONT color="green">065</FONT>            }<a name="line.65"></a>
<FONT color="green">066</FONT>    <a name="line.66"></a>
<FONT color="green">067</FONT>            @Override<a name="line.67"></a>
<FONT color="green">068</FONT>            public boolean equals(final Object obj){<a name="line.68"></a>
<FONT color="green">069</FONT>    <a name="line.69"></a>
<FONT color="green">070</FONT>                if(obj instanceof ClassTuple){<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>                    final ClassTuple other = (ClassTuple) obj;<a name="line.72"></a>
<FONT color="green">073</FONT>                    return<a name="line.73"></a>
<FONT color="green">074</FONT>    <a name="line.74"></a>
<FONT color="green">075</FONT>                    Objects.equal(baseClass, other.baseClass)<a name="line.75"></a>
<FONT color="green">076</FONT>                    &amp;&amp; Objects.equal(stopClass, other.stopClass);<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>                }<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>                return false;<a name="line.80"></a>
<FONT color="green">081</FONT>            }<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>            public Class&lt;?&gt; getBaseClass(){<a name="line.83"></a>
<FONT color="green">084</FONT>                return baseClass;<a name="line.84"></a>
<FONT color="green">085</FONT>            }<a name="line.85"></a>
<FONT color="green">086</FONT>    <a name="line.86"></a>
<FONT color="green">087</FONT>            public Class&lt;?&gt; getStopClass(){<a name="line.87"></a>
<FONT color="green">088</FONT>                return stopClass;<a name="line.88"></a>
<FONT color="green">089</FONT>            }<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>            @Override<a name="line.91"></a>
<FONT color="green">092</FONT>            public int hashCode(){<a name="line.92"></a>
<FONT color="green">093</FONT>                return Objects.hashCode(baseClass, stopClass);<a name="line.93"></a>
<FONT color="green">094</FONT>            }<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>        }<a name="line.96"></a>
<FONT color="green">097</FONT>    <a name="line.97"></a>
<FONT color="green">098</FONT>        private static final Map&lt;ClassTuple, BeanInfo&gt; BEANINFO_CACHE =<a name="line.98"></a>
<FONT color="green">099</FONT>            new MapMaker().expiration(20, TimeUnit.MINUTES)<a name="line.99"></a>
<FONT color="green">100</FONT>            .initialCapacity(255)<a name="line.100"></a>
<FONT color="green">101</FONT>            .makeComputingMap(BeanInfoAccessor.INSTANCE);<a name="line.101"></a>
<FONT color="green">102</FONT>    <a name="line.102"></a>
<FONT color="green">103</FONT>        /**<a name="line.103"></a>
<FONT color="green">104</FONT>         * Find a {@link PropertyDescriptor} by name in a given {@link BeanInfo}<a name="line.104"></a>
<FONT color="green">105</FONT>         * object.<a name="line.105"></a>
<FONT color="green">106</FONT>         * <a name="line.106"></a>
<FONT color="green">107</FONT>         * @exception RuntimeException<a name="line.107"></a>
<FONT color="green">108</FONT>         *                if no such property exists<a name="line.108"></a>
<FONT color="green">109</FONT>         */<a name="line.109"></a>
<FONT color="green">110</FONT>        public static PropertyDescriptor findDescriptor(final BeanInfo beanInfo,<a name="line.110"></a>
<FONT color="green">111</FONT>            final String propertyName){<a name="line.111"></a>
<FONT color="green">112</FONT>            for(final PropertyDescriptor propertyDescriptor :<a name="line.112"></a>
<FONT color="green">113</FONT>    <a name="line.113"></a>
<FONT color="green">114</FONT>                beanInfo.getPropertyDescriptors()){<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>                if(propertyDescriptor.getName()<a name="line.116"></a>
<FONT color="green">117</FONT>                    .equals(propertyName)) return propertyDescriptor;<a name="line.117"></a>
<FONT color="green">118</FONT>            }<a name="line.118"></a>
<FONT color="green">119</FONT>            throw Exceptions.create("Unknown property: %s in class %s",<a name="line.119"></a>
<FONT color="green">120</FONT>                propertyName,<a name="line.120"></a>
<FONT color="green">121</FONT>                beanInfo.getBeanDescriptor()<a name="line.121"></a>
<FONT color="green">122</FONT>                .getBeanClass());<a name="line.122"></a>
<FONT color="green">123</FONT>        }<a name="line.123"></a>
<FONT color="green">124</FONT>    <a name="line.124"></a>
<FONT color="green">125</FONT>        /**<a name="line.125"></a>
<FONT color="green">126</FONT>         * Find a {@link PropertyDescriptor} by name in a given bean class.<a name="line.126"></a>
<FONT color="green">127</FONT>         * <a name="line.127"></a>
<FONT color="green">128</FONT>         * @exception RuntimeException<a name="line.128"></a>
<FONT color="green">129</FONT>         *                if no such property exists<a name="line.129"></a>
<FONT color="green">130</FONT>         */<a name="line.130"></a>
<FONT color="green">131</FONT>        public static PropertyDescriptor findDescriptor(final Class&lt;?&gt; beanClass,<a name="line.131"></a>
<FONT color="green">132</FONT>            final String propertyName){<a name="line.132"></a>
<FONT color="green">133</FONT>            return findDescriptor(getBeanInfo(beanClass), propertyName);<a name="line.133"></a>
<FONT color="green">134</FONT>        }<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>        /**<a name="line.136"></a>
<FONT color="green">137</FONT>         * Get a {@link BeanInfo} object from the supplied class. Wraps the<a name="line.137"></a>
<FONT color="green">138</FONT>         * {@link Introspector#getBeanInfo(Class)} mechanism in a cache using a<a name="line.138"></a>
<FONT color="green">139</FONT>         * {@link java.util.concurrent.ConcurrentMap ConcurrentMap}, so it should<a name="line.139"></a>
<FONT color="green">140</FONT>         * perform better in a multi-threading scenario than the standard<a name="line.140"></a>
<FONT color="green">141</FONT>         * {@link Introspector} routines.<a name="line.141"></a>
<FONT color="green">142</FONT>         * <a name="line.142"></a>
<FONT color="green">143</FONT>         * @param beanClass<a name="line.143"></a>
<FONT color="green">144</FONT>         * @return the BeanInfo object<a name="line.144"></a>
<FONT color="green">145</FONT>         * @exception NullPointerException<a name="line.145"></a>
<FONT color="green">146</FONT>         *                if the supplied class is null<a name="line.146"></a>
<FONT color="green">147</FONT>         * @exception RuntimeException<a name="line.147"></a>
<FONT color="green">148</FONT>         *                if introspection fails<a name="line.148"></a>
<FONT color="green">149</FONT>         */<a name="line.149"></a>
<FONT color="green">150</FONT>        public static BeanInfo getBeanInfo(final Class&lt;?&gt; beanClass){<a name="line.150"></a>
<FONT color="green">151</FONT>            return Introspection.BEANINFO_CACHE.get(ClassTuple.from(beanClass));<a name="line.151"></a>
<FONT color="green">152</FONT>        }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        /**<a name="line.154"></a>
<FONT color="green">155</FONT>         * Get a {@link BeanInfo} object from the supplied base class and stop<a name="line.155"></a>
<FONT color="green">156</FONT>         * class. Wraps the {@link Introspector#getBeanInfo(Class, Class)} mechanism<a name="line.156"></a>
<FONT color="green">157</FONT>         * in a cache using a {@link java.util.concurrent.ConcurrentMap<a name="line.157"></a>
<FONT color="green">158</FONT>         * ConcurrentMap}, so it should perform better in a multi-threading scenario<a name="line.158"></a>
<FONT color="green">159</FONT>         * than the standard {@link Introspector} routines.<a name="line.159"></a>
<FONT color="green">160</FONT>         * <a name="line.160"></a>
<FONT color="green">161</FONT>         * @param beanClass<a name="line.161"></a>
<FONT color="green">162</FONT>         * @param stopClass<a name="line.162"></a>
<FONT color="green">163</FONT>         * @return the BeanInfo object<a name="line.163"></a>
<FONT color="green">164</FONT>         * @exception NullPointerException<a name="line.164"></a>
<FONT color="green">165</FONT>         *                if one of the supplied classes is null<a name="line.165"></a>
<FONT color="green">166</FONT>         * @exception RuntimeException<a name="line.166"></a>
<FONT color="green">167</FONT>         *                if introspection fails<a name="line.167"></a>
<FONT color="green">168</FONT>         */<a name="line.168"></a>
<FONT color="green">169</FONT>        public static BeanInfo getBeanInfo(final Class&lt;?&gt; beanClass,<a name="line.169"></a>
<FONT color="green">170</FONT>            final Class&lt;?&gt; stopClass){<a name="line.170"></a>
<FONT color="green">171</FONT>    <a name="line.171"></a>
<FONT color="green">172</FONT>            return Introspection.BEANINFO_CACHE.get(ClassTuple.from(<a name="line.172"></a>
<FONT color="green">173</FONT>                checkNotNull(beanClass, "Bean Class may not be null"), //<a name="line.173"></a>
<FONT color="green">174</FONT>                checkNotNull(stopClass, "Stop Class may not be null") //<a name="line.174"></a>
<FONT color="green">175</FONT>            ));<a name="line.175"></a>
<FONT color="green">176</FONT>        }<a name="line.176"></a>
<FONT color="green">177</FONT>    <a name="line.177"></a>
<FONT color="green">178</FONT>        /**<a name="line.178"></a>
<FONT color="green">179</FONT>         * Get a {@link BeanInfo} object from a bean object.<a name="line.179"></a>
<FONT color="green">180</FONT>         * <a name="line.180"></a>
<FONT color="green">181</FONT>         * @exception NullPointerException<a name="line.181"></a>
<FONT color="green">182</FONT>         *                if the supplied bean is null<a name="line.182"></a>
<FONT color="green">183</FONT>         * @exception RuntimeException<a name="line.183"></a>
<FONT color="green">184</FONT>         *                if introspection fails<a name="line.184"></a>
<FONT color="green">185</FONT>         */<a name="line.185"></a>
<FONT color="green">186</FONT>        public static BeanInfo getBeanInfo(final Object bean){<a name="line.186"></a>
<FONT color="green">187</FONT>    <a name="line.187"></a>
<FONT color="green">188</FONT>            return getBeanInfo(checkNotNull(bean).getClass());<a name="line.188"></a>
<FONT color="green">189</FONT>        }<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>        /**<a name="line.191"></a>
<FONT color="green">192</FONT>         * Returns a List of all {@link PropertyDescriptor PropertyDescriptors}<a name="line.192"></a>
<FONT color="green">193</FONT>         * associated with a {@link BeanInfo} Object.<a name="line.193"></a>
<FONT color="green">194</FONT>         * <a name="line.194"></a>
<FONT color="green">195</FONT>         * @exception NullPointerException<a name="line.195"></a>
<FONT color="green">196</FONT>         *                if the supplied {@link BeanInfo} is null<a name="line.196"></a>
<FONT color="green">197</FONT>         * @exception RuntimeException<a name="line.197"></a>
<FONT color="green">198</FONT>         *                if introspection fails<a name="line.198"></a>
<FONT color="green">199</FONT>         */<a name="line.199"></a>
<FONT color="green">200</FONT>        public static ImmutableList&lt;PropertyDescriptor&gt; listPropertyDescriptors(<a name="line.200"></a>
<FONT color="green">201</FONT>            final BeanInfo beanInfo){<a name="line.201"></a>
<FONT color="green">202</FONT>            return ImmutableList.copyOf(checkNotNull(beanInfo).getPropertyDescriptors());<a name="line.202"></a>
<FONT color="green">203</FONT>        }<a name="line.203"></a>
<FONT color="green">204</FONT>    <a name="line.204"></a>
<FONT color="green">205</FONT>        /**<a name="line.205"></a>
<FONT color="green">206</FONT>         * Returns a List of all {@link PropertyDescriptor PropertyDescriptors}<a name="line.206"></a>
<FONT color="green">207</FONT>         * associated with a bean class.<a name="line.207"></a>
<FONT color="green">208</FONT>         * <a name="line.208"></a>
<FONT color="green">209</FONT>         * @exception NullPointerException<a name="line.209"></a>
<FONT color="green">210</FONT>         *                if the supplied class is null<a name="line.210"></a>
<FONT color="green">211</FONT>         * @exception RuntimeException<a name="line.211"></a>
<FONT color="green">212</FONT>         *                if introspection fails<a name="line.212"></a>
<FONT color="green">213</FONT>         */<a name="line.213"></a>
<FONT color="green">214</FONT>        public static ImmutableList&lt;PropertyDescriptor&gt; listPropertyDescriptors(<a name="line.214"></a>
<FONT color="green">215</FONT>            final Class&lt;?&gt; beanClass){<a name="line.215"></a>
<FONT color="green">216</FONT>            final BeanInfo beanInfo = getBeanInfo(checkNotNull(beanClass));<a name="line.216"></a>
<FONT color="green">217</FONT>            return listPropertyDescriptors(beanInfo);<a name="line.217"></a>
<FONT color="green">218</FONT>        }<a name="line.218"></a>
<FONT color="green">219</FONT>    <a name="line.219"></a>
<FONT color="green">220</FONT>        /**<a name="line.220"></a>
<FONT color="green">221</FONT>         * Returns a List of all {@link PropertyDescriptor PropertyDescriptors}<a name="line.221"></a>
<FONT color="green">222</FONT>         * associated with a bean Object.<a name="line.222"></a>
<FONT color="green">223</FONT>         * <a name="line.223"></a>
<FONT color="green">224</FONT>         * @exception NullPointerException<a name="line.224"></a>
<FONT color="green">225</FONT>         *                if the supplied bean is null<a name="line.225"></a>
<FONT color="green">226</FONT>         * @exception RuntimeException<a name="line.226"></a>
<FONT color="green">227</FONT>         *                if introspection fails<a name="line.227"></a>
<FONT color="green">228</FONT>         */<a name="line.228"></a>
<FONT color="green">229</FONT>        public static ImmutableList&lt;PropertyDescriptor&gt; listPropertyDescriptors(<a name="line.229"></a>
<FONT color="green">230</FONT>            final Object bean){<a name="line.230"></a>
<FONT color="green">231</FONT>            checkNotNull(bean);<a name="line.231"></a>
<FONT color="green">232</FONT>            final BeanInfo beanInfo = getBeanInfo(bean);<a name="line.232"></a>
<FONT color="green">233</FONT>            return listPropertyDescriptors(beanInfo);<a name="line.233"></a>
<FONT color="green">234</FONT>        }<a name="line.234"></a>
<FONT color="green">235</FONT>    <a name="line.235"></a>
<FONT color="green">236</FONT>        private Introspection(){}<a name="line.236"></a>
<FONT color="green">237</FONT>    <a name="line.237"></a>
<FONT color="green">238</FONT>    }<a name="line.238"></a>




























































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